Clevis



view of the end of the v UNITED STATES PATENT GFFICE.

EMERY M. Mcvronnn, on MADISON, WISCONSIN.

CDLVEVIS.

SPECIFICATION forming part of Letters ratnt No. 406,761, dated July 9, 1889. A nmaa filed November 30, 18881 Serial No.292,314. (No model.)

T5 all whom it may concern.-

Be it known that I, EMERY M. MGVICKER, a citizen of the United States, residing at Madison, in the county of Dane and State of Wisconsin, have invented a certain new andf useful Improvement in Clevises, which is fully set forth in the following specification, refer ence being had to the accompanying drawings, in which- Figure 1 is a plan view of a clevis embody ing my invention; Fig. 2, a sectional View of the same taken on the line 1 1 of Fig. 1; Fig.

3, a sectional View taken on the line 2 2 of Fig. 2; Fig. 4, a sectional view taken on the line 3 3 of Fig. 2; Fig. 5, a bottom plan View of the spring-catch; and Fig.6, a detail plan clevis, the pin being removed.

Like letters refer to like parts in all the figures of thedrawings. V

My invention'relates to clevises, and has for its object to provide means for holding the clevis-pin in position and preventing accidental displacement thereof.

To these ends my invention consists in certain novel features, which I will now proceed to describe, and Will then particularly point out in the claims.

In the drawings, A represents the body of the clevis, which may be of any suitable form, having in the present instance the usual U shape, being provided with an aperture 0., extending vertically through. its free ends to receive the clevis-pin B. This latter is provided with an enlarged head I), by means of which it may be handled and which serves to prevent its slipping down through theaperture a. Immediately below this head the pin is reduced, as shown at I), this reduction being preferably effected by forming a circular groove entirely around the said pin immediately below the head, although the same result may be obtained by flattening the pin at this point. The lower end of the clevispin is preferably given a conical shape, as shown at 6 for the purpose hereinafter described.

The upper portionof the upper arm of the .elevis-body A is cut away, as shown at a,

leaving, however, one-half of the endportion to extend upward to the original height, as

shown at A. This cut-away portion receives the spring-catch or latch-lever C, which has substantially the shape of that portion of the clev-is-body which is cut away, and which,

therefore, .when in its normal. position, lies.

flush with the rest of the body, thus doing away with any angles or projections. This latch is provided with an aperture 0, to reother suitable device for the purpose, is enr-.

ployed to hold the latch O in position. It will be observed that the latch is provided with a slight indentation or notch 'c on the j inner edge of its forward-projecting portion, to enable it to fit around the reduced portion 1) of the clevis-pin B when closed.

D represents a spring coiled around the post A and having one end connected to the clevis-body and the other end connected to the latch. This spring is inclosed between the latch and clevis-body, and in order to accommodate the same there is formedjinthe under face of the latch a groove 0 surrounding the aperture 0 and extending rearward therefrom, as shown more particularlyin Fig. 4. A similar groove a is formed in the up per face of the clevis-body surrounding the post A and extending forward therefrom. NVhen the parts are assembled in the manner shown in the drawings, this spring is completely covered and protected by the parts between which it is located and acts to force the latch normally inward to cause it to enthe same downward, the latch is forced outward to admit the pin, which is then forced clear down through the aperture a into the position shown in the other figures of the drawings. When the reduced portion b comes opposite the latch C, the spring D will force the said latchinward, so that it will engage with the said reduced portion, and by.

this engagement lock the pin firmly in position and prevent accidental displacement thereof. When in this position, the head I) of the pin rests partly upon the projection A p and partly upon the top of the latch C. When it is desired to release the pin, the latch O is actuated to disengage it from the pin, preferably by pushing against the forward end of the latch, and when the same is in the position shown in dotted lines in Fig. 1 the pin may be removed and the latch allowed to return to its normal position.

It will be observed that I have provided'a simple and efiective device,which does not increase the size of the clevis and which presents no projections or shoulders, which device will automatically engage with and lock the clevis-pin in position when the same is inserted, and which may be readily disengaged to permit the removal of said pin.

I am aware that it is common to secure clevis-bolts both by springs and by latches of various kinds, and I therefore do not wish to be understood as claiming such a construction, broadly. H 1

.Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

, 1. The combination, with the clevis provided with rigid arms having end apertures and an independent pin, of the latch or arm pivoted on one of the said rigid arms of the clevis and adapted to be turned upon its pivot so as to be brought into engagementwith the clevis-pin, and a spring bearing upon said pivoted latch or arm and holding the same normally in a position to engage with the clevispin, substantially as and for the purposes specified.

2. The combination, with the clevis-body having rigid arms, one of which is cut away,

as described, and an independent pin, of a spring-actuated latch or arm pivoted on said cut-away portion and having the form thereof, whereby a flush surface without any projections is provided, substantially as and for the purposes specified.

3. The combination, in a clevis, of the body A, with rigid arms provided with apertures a, one of said arms being cut away, as shown at a, and having projection A, arranged at one side of the aperture 0, and having a latch in the form of said out-away portion, on which it is mounted and abutting normally againstthe projection A, substantially as and for the purposes specified.

4:. The combination, with the clevis-pin, of the clevis-body having rigid arms, one of which is cut away, as described, a pivoted latch mounted on said cut-away portion and having the form thereof, and a spring for actu- EMERY M. MCVICKER.

\Vitnesses:

CARRIE FEIGEL, J. M. THACHER. 

